Details
| Translated title of the contribution | Universelle Methode zur Herstellung von Aerogelen aus kolloidalen Nanopartikellösungen durch Einfrieren und anschließendes Gefriertrocknen |
|---|---|
| Original language | English |
| Pages (from-to) | 1200-1203 |
| Number of pages | 4 |
| Journal | Angewandte Chemie |
| Volume | 55 |
| Issue number | 3 |
| Early online date | 7 Dec 2015 |
| Publication status | Published - 12 Jan 2016 |
Abstract
A versatile method to fabricate self-supported aerogels of nanoparticle (NP) building blocks is presented. This approach is based on freezing colloidal NPs and subsequent freeze drying. This means that the colloidal NPs are directly transferred into dry aerogel-like monolithic superstructures without previous lyogelation as would be the case for conventional aerogel and cryogel fabrication methods. The assembly process, based on a physical concept, is highly versatile: cryogelation is applicable for noble metal, metal oxide, and semiconductor NPs, and no impact of the surface chemistry or NP shape on the resulting morphology is observed. Under optimized conditions the shape and volume of the liquid equal those of the resulting aerogels. Also, we show that thin and homogeneous films of the material can be obtained. Furthermore, the physical properties of the aerogels are discussed. A versatile method to fabricate self-supported porous monoliths of extremely low density consisting of nanoparticle (NP) building blocks is presented. Our approach is based on freezing and subsequent freeze drying of aqueous colloidal NPs. The assembly process is highly versatile: cryogelation is applicable for noble metal, metal oxide, and semiconductor NPs, and shaping of the aerogels is easily possible.
Keywords
- aerogels, cryogels, noble metal nanoparticles, voluminous superstructures
ASJC Scopus subject areas
- Chemical Engineering(all)
- Catalysis
- Chemistry(all)
- General Chemistry
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In: Angewandte Chemie , Vol. 55, No. 3, 12.01.2016, p. 1200-1203.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Versatile Aerogel Fabrication by Freezing and Subsequent FreezeDrying of Colloidal Nanoparticle Solutions
AU - Freytag, Axel
AU - Sánchez-Paradinas, Sara
AU - Naskar, Suraj
AU - Wendt, Natalja
AU - Colombo, Massimo
AU - Pugliese, Giammarino
AU - Poppe, Jan
AU - Demirci, Cansunur
AU - Kretschmer, Imme
AU - Bahnemann, Detlef W.
AU - Behrens, Peter
AU - Bigall, Nadja C.
N1 - Funding information: N.C.B., A.F., S.S.-P., S.N., and J.P. are grateful for financial support from the German Federal Ministry of Education and Research (BMBF) within the framework of NanoMatFutur, support code 03X5525. I.K. and D.W.B. gratefully acknowledge financial support from the Deutsche Forschungsgemeinschaft (DFG, SPP1613). We also would like to thank Dr. Dirk Dorfs and Dominik Hinrichs for scientific discussions.
PY - 2016/1/12
Y1 - 2016/1/12
N2 - A versatile method to fabricate self-supported aerogels of nanoparticle (NP) building blocks is presented. This approach is based on freezing colloidal NPs and subsequent freeze drying. This means that the colloidal NPs are directly transferred into dry aerogel-like monolithic superstructures without previous lyogelation as would be the case for conventional aerogel and cryogel fabrication methods. The assembly process, based on a physical concept, is highly versatile: cryogelation is applicable for noble metal, metal oxide, and semiconductor NPs, and no impact of the surface chemistry or NP shape on the resulting morphology is observed. Under optimized conditions the shape and volume of the liquid equal those of the resulting aerogels. Also, we show that thin and homogeneous films of the material can be obtained. Furthermore, the physical properties of the aerogels are discussed. A versatile method to fabricate self-supported porous monoliths of extremely low density consisting of nanoparticle (NP) building blocks is presented. Our approach is based on freezing and subsequent freeze drying of aqueous colloidal NPs. The assembly process is highly versatile: cryogelation is applicable for noble metal, metal oxide, and semiconductor NPs, and shaping of the aerogels is easily possible.
AB - A versatile method to fabricate self-supported aerogels of nanoparticle (NP) building blocks is presented. This approach is based on freezing colloidal NPs and subsequent freeze drying. This means that the colloidal NPs are directly transferred into dry aerogel-like monolithic superstructures without previous lyogelation as would be the case for conventional aerogel and cryogel fabrication methods. The assembly process, based on a physical concept, is highly versatile: cryogelation is applicable for noble metal, metal oxide, and semiconductor NPs, and no impact of the surface chemistry or NP shape on the resulting morphology is observed. Under optimized conditions the shape and volume of the liquid equal those of the resulting aerogels. Also, we show that thin and homogeneous films of the material can be obtained. Furthermore, the physical properties of the aerogels are discussed. A versatile method to fabricate self-supported porous monoliths of extremely low density consisting of nanoparticle (NP) building blocks is presented. Our approach is based on freezing and subsequent freeze drying of aqueous colloidal NPs. The assembly process is highly versatile: cryogelation is applicable for noble metal, metal oxide, and semiconductor NPs, and shaping of the aerogels is easily possible.
KW - aerogels
KW - cryogels
KW - noble metal nanoparticles
KW - voluminous superstructures
UR - http://www.scopus.com/inward/record.url?scp=84954288462&partnerID=8YFLogxK
U2 - 10.1002/anie.201508972
DO - 10.1002/anie.201508972
M3 - Article
AN - SCOPUS:84954288462
VL - 55
SP - 1200
EP - 1203
JO - Angewandte Chemie
JF - Angewandte Chemie
SN - 1433-7851
IS - 3
ER -